Las Vegas

Isaac Brekken / Getty Images

First Lady Michelle Obama administers a pledge to junior rangers at the Red Rock National Conservation Area in Las Vegas during an event to help launch Obama's "Let's Move Outside!" initiative to promote more outdoor activity for children.

First Lady Michelle Obama administers a pledge to junior rangers at the Red Rock National Conservation Area in Las Vegas during an event to help launch Obama's "Let's Move Outside!" initiative to promote more outdoor activity for children. (Isaac Brekken / Getty Images)

First Lady Michelle Obama administers a pledge to junior rangers at the Red Rock National Conservation Area in Las Vegas during an event to help launch Obama's "Let's Move Outside!" initiative to promote more outdoor activity for children.